Allen's hummingbird (selasphorus sasin) has been studied by zoologist bill alther.† suppose a small group of 10 allen's hummingbirds has been under study in arizona. the average weight for these birds is x = 3.15 grams. based on previous studies, we can assume that the weights of allen's hummingbirds have a normal distribution, with σ = 0.26 gram. (a) find an 80% confidence interval for the average weights of allen's hummingbirds in the study region. what is the margin of error? (round your answers to two decimal places.)

a. she will receive a refund of $278.

step-by-step explanation:

the number of possible outcomes that do not show a 1 on the first spinner and show the number 4 on the second spinner is 2.

spinner 1 spinner 2

1                     1

1                     2

1                     3

1                     4

2                   1

2                   2

2                   3

2                   4   = not 1, and 4

3                   1

3                   2

3                   3

3                   4 = not 1, and 4

only 2 outcomes have passed the given condition.

step-by-step explanation: